Stencil and inking device therefor



STENCIL AND INKING DEVICE THEREFOR Filed March so, 1935' i7///////////////////////Ill///////////////////////////////////////////////// Patented Aug. 1935 UNITED STATES 2,012,52c STENCIL AND mxmc. DEVICE 'rnnanroa William B. Whitmore, Chicago, Ill., assignor to Ditto Incorporated, a corporation of West Virginia Application March 30, 1933, Serial No. 663,581

The invention relates to stencil's'and inking devices therefor and is particularly adapted to be embodied in stencils of the type commonly employed in mimeographing machines.

5 A particular object of the inventionis to provide an improved stencil comprising inking means.

Another particular object of the invention is to provide improved means for supplying ink to a stencil. e

Other objects and advantages will become. apparent as the following detailed description progresses, reference being had to the accompanying drawing wherein- Fig. 1 is a fragmentary section taken through a stencil which embodies the invention, the stencil being shown in connection with means for supplying moisture thereto.

Fig. 2 is a fragmentary section taken through a stencil which embodies another form of the invention, the stencil being shown in connection with means for moistening it.

Fig. 3 is a fragmentary section-taken through a moistening band, improved means for inking a stencil and a stencil embodying another form of,

the invention. I

' l is a section taken through a stencil which embodies another form of the invention, the stencil being shown in connection with means for moistening it, and

' Fig. 5 is a section taken through improved means for supplying ink to a stencil.

Referring for the present to Fig. 1 which illustrates a preferred embodiment of the invention,

the reference character l0 designates generally a stencil which embodies the invention, the stencil Ill being shown in connection with aiband ll adapted to supply water to the stencil l0.

, The stencil l0 preferably comprises a sheet of 40 paper l2, preferably yoshino paper. One side of the paper I! is providedwith the usual stencil coating 13in which the letters or data tobe duplicated are cut. This coating may be of any suitable material. Thus, it may comprise a lacquer having a cellulose base. The other side of the paper I! is provided with a coating I 4 which comprisesa dye or in: preferably soluble in water ,although other dyes and inks may be used and subjected to suitable solvents during the duplieating operation. As a suitable ink, crystal violet or methyl violet may be employed, incorporated in a suitable vehicle. The requirements of the vehicle are that it will bind the dye or pigment to the paper, and will not prevent solution of the dye when the solvent is brought into contact with the dye. As an example. of a suitable vehicle for use .with water as ,the solvent, gum arabic'and glycerine may be used. 7 The moistening band ll may comprise a layer I of cloth, felt, gelatinized material, or any other 5 material capable of storing and delivering a supply of the solvent, or capable of transmitting the solvent from a reservoir to the stencil. In this instance I have shown a duplicating band ll duplicating process, the data to be duplicated are 15 first out into the coating iii in the usual manner.

In Fig. 1, letters are shown cut in the coating l3 at Ill. The stencil may then be placed upon the gelatinized, band I I in the manner illustrated in Fig. 1, the band being first moistened thoroughly. 20 The water will dissolve sufficient dye or ink in the coating I4 and the ink or dye passes up through the paper l2 to the openings I 8. Then if a sheet of paper is placed upon the coating I3 and pressure is applied thereto, the ink or dye 25 will form the letters 18 on the paper; A relatively large number of sheets may be duplicated in this manner.

The invention is limited to use in connection with a moistening band only to the extent indi- 30 cated in the appended claims as any suitable means may be provided to supply solvent thereto.

Another form of the invention is illustrated in Fig. 2. It consists of a stencil Illa which comprises a sheet of paper I21; and coatings l3a and 3 Ma. The paper [2a is preferably of the same type as that employed in the stencil l0 described above. The coating Ila is interposed between the paper I21; and the coating I31: and is preferably formed from the same materials as the coating ll described above. The coating l3a is preferably formed from the same materials as the coating l3 described above and has the same function. The data to be duplicated are cut into 45 the coating l3a as indicated at l8a. When the stencil I Ila is to be employed in a duplicating operation, moisture is supplied to the bottom or uncoated surface of the paper l2a and it passes upwardly through the paper to'dis- 50 'solve the dye or ink in the coating Ila. Then to the stencil.

Another form of the invention is illustrated in Fig. 3. The reference character 20 designates generally a stencil of the conventional type. The stencil 20 preferably comprises a sheet of paper 2i provided with the usual coating 22 which may be a lacquer having a cellulose base. The reference character 25 designates an inking device which embodies the invention. The inking device 25 preferably comprises a sheet l2b of paper which is preferably of the same type as the paper I2 described above. One surface of the paper I2b is provided with a coating Mb which is preferably formed from the same materials as the coating I4 described above. In Fig. 3, the inking device 25 is shown interposed between the stencil 20 and a gelatinized band Ilb which is preferably of the same type as the gelatinized band i i described above. The band IIb preferably comprises a paper backing I5b provided with a coating IGb of gelatin. The data to be duplicated are cut into the coating 22 as indicated at I8b.

When the inking device 25 is to be employed in a duplicating operation, the stencil 20 is placed upon the coating Nb and the inking device 25 is placed upon the gelatin coating I6b in the manner illustrated in Fig. 3, the gelatin coating ifib having first been thoroughly moistened. The water from the gelatin passes upwardly through the paper l2b and dissolves the ink or dye in the coating I 4b so that it may pass up through the paper 2| into the openings made for the data I 81). The sheets to be duplicated are placed upon the coating 22 and suflicient pressure is applied to the sheets so that the data will be duplicated thereon.

Any other suitable means instead of the gelatin band I ib may be employed to supply water to the inking device 25.

In Fig. 4, another form of the invention is illustrated. The reference character I00 designates generally a stencil sheet which comprises a sheet I2c of paper provided with a stencil coating I3'c, the paper i2c and the coating I3c being preferably formed of the same materials as the paper I2 and the coating I3 described above. The paper I2c is impregnated with a suitable ink or dye preferably of the type described above so that it is soluble in water. The data out in the stencil coating I3c are shown at I80.

The stencil Iilc is illustrated in connection with a moistening device designated generally by the reference character lie. The moistening device Ilc comprises a reservoir or receptacle lid adapted to hold a supply of water. The receptable lid is provided with an extension 26 through which the receptacle may be filled with water. A perforate sheet metal member 21 is disposed in the upper end of the receptacle lid and resting upon the perforate member 21 is a felt pad 28. The upper end of the extension 26 is preferably in a plane which passes through the felt pad 28 so that when the extension is entirely filled with water, the water tends to flow up into the felt pad 28 through the apertures in the member 21. The stencil IIlc is placed upon the felt pad 28 and during the duplicating operations the water feeds upwardly by capillary attraction through the felt pad 28, the paper I20 and thence through the data I8c cut in the coating I30. Of course, when pressure is applied to the sheets being duplicated, it tends to force the water upwardly through the felt pad 28 and the paper iilc. The sheets to be duplicated are placed one by the stencil. It may be moistened to supply water one on the coating I30 and pressure is applied thereto by means of a roller or any other suitable device. The water dissolves the ink or dye in the paper I00 and it passes upwardly through the openings I to the paper being duplicated.

In the form of the invention illustrated in Fig. 4, the sheet I2c of paper may be impregnated throughout with the ink or dye or it may be impregnated only part way therethrough. In some instances, it is contemplated that the stencil I2c will also be provided with a coating on one or both sides thereof, which coating will comprise the ingredients of the coating I4, described above, or the equivalent for the purpose.

Fig. 5 illustrates a form of the invention which may be utilized in the same manner as the inking device 25 shown in Fig. 3. In Fig. 5, the reference character 30 designates a sheet of paper impregnated with an ink. It may be substituted for the inking device 25 and subjected to a solvent for the ink so that copies may be made of the stencil.

It should be understood that the substances forming the inking and stencil coatings described above penetrate the paper to which they adhere. The extent 'of this penetration depends upon the materials in the coatings. In some instances, the materials from which stencil coatings are formed, penetrate entirely through the paper so that the uncoated surface of the paper appears to have a thin coating thereon.

While I have shown and described certain embodiments of my invention, it is to be understood that it is capable of many modifications.

Changes, therefore in the construction and ar- I rangement may be made without departing from cated are formed.

2. A stencil comprising a paper impregnated with substantially dry ink, and a stencil coating on said paper, said ink being distributed coextensively with the area of the coating in which the data to be duplicated are formed.

3. A stencil comprising a paper having a supply of ink thereon, and a stencil coating on said paper, said ink being distributed coextensively with the area of the coating in which the data to be duplicated are formed.

4. A stencil comprising a paper having a supply of substantially dry ink therein, and a stencil coating on said paper, said ink being distributed coextensively with the area of the coating in which the data to be duplicated are formed.

5. A stencil comprising a paper, a coating on said paper for receiving data to be duplicated, and a second coating on said paper,said second coating comprising an inking substance and being substantially coextensive in area with that area of the first mentioned coating which receives thefirst mentioned coating which receives data to v be duplicated, and a vehicle for said ink.

7. A stencil comprising a paper,'a coating on second coating on said paper, said second coating comprising an inking substance soluble in water and being substantially coextensive in area with that area of the first mentioned coating which receives data to be duplicated.

8. A stencil comprising a paper, a coating on said paper-for receiving data to be duplicated, a second coating on said paper, said second coating comprising an inking substance and being substantially coextensive in area with that area of the first mentioned coating which receives data. to be duplicated, and a binder for said ink.

9.. A stencil comprising a paper, a coating on said paper for receiving data to be duplicated, a second coating on said paper, said second coating comprising an inking substance, a gum, and glycerine.

10. A stencil comprising a paper, a coating on said paper for receiving data to be duplicated, a second coating on said paper, said second coating comprising an inking substance, a gum, and a hygroscopic, agent.

11. A stencil comprising a paper, a coating on one side of said paper for receivingdata to be duplicated, and a second coating on the other side of said paper, said second coating comprising an inking substance and being substantially coextensive in area with that area of the first mentioned coating which receives data to be duplicated.

12. A stencil comprising a paper, a coating including an inking substance applied to a surface of said paper, and a second coating applied to the outer side of the first mentioned coating,

said second coating having data to be duplicated marked thereon.

13. In combination with a gelatinized band, a. stencil comprising a paper, a coating on said paper in which data to be duplicated are cut, and a second coating including an inking substance.

14. A method of duplicating with a stencil having a coating which is perforated with the data to be duplicated, which method comprises associating a layer impregnated with inking material with said stencil, and then subjecting said inking substance to a solvent therefor.

15. The method of inking a stencil having a coating which is perforated with the data to be duplicated, which method comprises associating a quantity of relatively dry ink with said stencil, and then subjecting said ink to a solvent.

16. The method of inking a. stencil, which method comprises associating a. quantity of substantially dry coloring matter with said stencil, and then subjecting said coloring matter to a solvent during the duplicating operation.

17. As an article of manufacture, a stencil having a coating in which the data to be duplicoating in which the data to be duplicated are.

cut.

- WILLIAM B. WHITMORE. 

